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EVM Transaction Explainer
x402
EVM Transaction Explainer is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Decodes any EVM blockchain transaction hash into a human-readable summary across 11 supported chains
Price / call$0.01
Success—
StatusUnknown
How this service works
Decode and explain any EVM blockchain transaction across 11 chains (Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, Hyperliquid). Get a human-readable summary of swaps, transfers, approvals, DeFi interactions, and more.
Output
Returns a human-readable summary of the transaction (e.g. 'User swapped 1 ETH for 3,200 USDC on Uniswap'), the chain name, a link to the block explorer, transaction status (success/failed), and optionally a detailed breakdown of all events, token flows, and contract interactions involved.
Example use cases
Example prompt
“Can you explain what happened in this Ethereum transaction — 0x4a3b2c1d9e8f7a6b5c4d3e2f1a0b9c8d7e6f5a4b3c2d1e0f9a8b7c6d5e4f3a2b — give me a detailed breakdown?”
Technical details
Endpoint
GEThttps://x402.ottoai.services/tx-explainer?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to decode an opaque EVM transaction hash into human-readable information — especially for DeFi interactions like swaps, liquidity additions, approvals, and token transfers. Supports 11 chains including Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, and Hyperliquid. Ideal for wallets, portfolio tools, or any agent that needs to explain blockchain activity to a non-technical user.
Side effects
- Invalid or malformed transaction hash returns an error field in the response
- Transaction hash not found on the specified chain returns a failed status
- Unsupported chain name returns a validation error
- Network timeouts when fetching on-chain data
- Transaction pending or very recent may not yet be indexed
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "ethereum",
"txHash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060",
"outputLevel": "summary"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"chain": "Ethereum",
"txHash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060",
"summary": "Transferred <0.0001 ETH to 0x5",
"explorerUrl": "https://etherscan.io/tx/0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}Schema · Response
{
"type": "json",
"example": {
"chain": "Base",
"status": "success",
"txHash": "0x...",
"summary": "Swapped 0.5 ETH for 1,247.83 USDC via Uniswap V3",
"explorerUrl": "https://basescan.org/tx/0x..."
}
}Tags
x402
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